期刊
FISH & SHELLFISH IMMUNOLOGY
卷 34, 期 5, 页码 1071-1077出版社
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.fsi.2013.01.014
关键词
Crassostrea gigas; AIF-1; Hemocyte activation; Phagocytosis; Inflammatory cytokine
资金
- National Science Foundation of China [31001130, 41176150]
- National Basic Research Program of China [2010CB126404]
- NSFC-Guangdong of China [U1201215]
Allograft inflammatory factor-1 (AIF-1) is a calcium-binding cytokine associated with immune cell activation and inflammatory response. Presently, we have identified and characterized an AIF-1 in a marine bivalve mollusk, Crassostrea gigas, and designated it as CgAIF-1. The full-length CgAIF-1 cDNA is 794 bp, encoding a protein of 149 amino acids with two conserved EF hand Ca2+-binding motifs. CgAIF-1 is constitutively expressed in various tissues with enriched expression in hemocytes. Moreover, CgAIF-1 transcription is induced by multiple Pathogen-Associated Molecular Patterns (PAMPs), including poly (I: C), LPS, PGN, HKLM and HKVA, but is limited by 1,3-beta-glucan. Furthermore, recombinant CgAIF-1 can specifically stimulate phagocytic ability of granulocytes, but not of intermediate cells and hyalinocytes. CgAIF-1 also enhances mRNA levels of MIF, TNF and IL-17. These results provide the first functional evidence that CgAIF-1 is involved in hemocyte activation in C gigas, revealing conserved functions of AIF-1 in host defense from mollusks to mammals. (C) 2013 Elsevier Ltd. All rights reserved.
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